The future of a reticular titanium cylinder implant inserted for fractured lumbar vertebrae has been controlled. The phenomenon of a reticular implant introduction into the spondylodized vertebrae body was found. The implant was found to be introduced at one or two levels. The spondylodesis results were assessed using a new index — the implant introduction coefficient — followed by the implant introduction degree definition. An improved version of the reticular titanium cylinder implant has been designed.